package main

import "fmt"

var (
	a int
	b string
	c float32
)

func main() {
	fmt.Printf("%T", a)
	fmt.Printf("%T", b)
	fmt.Printf("%T", c)

}

func f1() {
	//go的交换变量
	d := 1
	e := 2
	d, e = e, d
	fmt.Println(d, e)
}
